Differences to respect:  - A std::variant holds for better or worse, which type is stored, needing additional memory  - Wherever the object is transmitted or stored, all alternatives have to be listed (as template parameters to the std::variant type)  - std::variant also works with non-polymorphic types   -----Ursprüngliche Nachricht----- Von:Robin Savonen Söderholm via Std-Proposals <std-proposals_at_[hidden]> Gesendet:Di 10.06.2025 11:42 Betreff:Re: [std-proposals] std::polyhandle (Draft Paper Attached) An:C++ Proposals <std-proposals_at_[hidden]>; CC:Robin Savonen Söderholm <robinsavonensoderholm_at_[hidden]>; So we have a use-case: you want to create a container of both Qt and Wx widgets. A safe solution that you can use today:  ```C++ std::vector<std::variant<QWindow, wxWidget>> g_all_windows; for (auto& p : g_all_windows) {   if(auto* p = std::get_if<QWindow>(&p); p != nullptr) DoSomething();   else if(auto* p = std::get_if<wxWidget>(&p); p != nullptr) DoSomethingElse();   } ``` // Robin